To enforce vigorously the federal criminal laws of the United States, to represent effectively the interests of the United States in civil litigation, and to meet fully the public safety needs of the community through an efficient, well-coordinated law enforcement effort.
Promote the fair and impartial administration of justice, adhering to the highest ethical, professional and performance standards; Promote effective partnerships with local, state and federal law enforcement agencies, and the community at large in furtherance of law enforcement; Protect the rights of citizens, victims of crime and witnesses; Enhance community safety by reducing crime and the fear of crime, through outreach and education; Inspire confidence in the criminal justice system.
"The United States Attorney is the representative not of an ordinary party to a controversy but of a sovereignty whose obligation to govern impartially is as compelling as its obligation to govern at all; and whose interest, therefore, in a criminal prosecution is not that it shall win a case, but that justice shall be done. As such, he is in a peculiar and very definite sense the servant of the law, the twofold aim of which is that guilt shall not escape or innocence suffer. He may prosecute with earnestness and vigor - indeed, he should do so. But, while he may strike hard blows, he is not at liberty to strike foul ones. It is as much his duty to refrain from improper methods calculated to produce a wrongful conviction as it is to use every legitimate means to bring about a just one."
Justice Sutherland; Berger v. United States; Supreme Court of the United States; 1935